SPECTRAL INTENSITIES IN THE NU-1 BAND OF NH3

Intensities have been measured for individual transitions in the Q and R branches of the nu1 band of NH3 using a difference-frequency laser spectrometer. The data yield an integrated band strength of S(v)0 = 21 9.36 +/- 1.03 cm-2/MPa at 297 K, corresponding to a transition moment of \mu(v)\ = 8.535(20) x 10(-32) C . m, and a Herman-Wallis correction factor, (1 + alpha(J)m)2, where alpha(J) = 0.0209(20). The intensitie s of a few lines for K greater-than-or-equal-to 7 were noticeably pert urbed by a perpendicular Coriolis interaction with 2nu4(E, l = 2), so were excluded from the fit. A small sample of nu3 band lines occurring in the nu1 band scans also yields a rough estimate of the nu3 band in tensity with evident irregular perturbations.